单词	ultralow frequency
释义	ultralow frequency noun : a radio frequency in the lower range of the radio spectrum from about 300 Hz to 3 kHz Communicating with subs thousands of miles away, under thousands of feet of ocean, requires ultralow frequencies … Noah Shachtman, Wired, August 2009 —abbreviation ULF see Radio Frequencies Table Word History First Known Use 1994, in the meaning defined above
随便看	stair-climber stair-climbing stair-stepper staircase staircase curve staircase shell staircases stairfoots stairheads stairlifts stairs stairstep stairsteps stairway stairways stairwell stairwells staithe staithes staiths stakage stake stake a claim stake and bound stake boat

英语词典包含469781条英英释义在线翻译词条，基本涵盖了全部常用单词的英英翻译及用法，是英语学习的有利工具。